public boolean isPrerequisite(final CrawlURI curi) {
boolean result = false;
String curiStr = curi.getUURI().toString();
String loginUri = getPrerequisite(curi);
if (loginUri != null) {
try {
UURI uuri = UURIFactory.getInstance(curi.getUURI(), loginUri);
if (uuri != null && curiStr != null && uuri.toString().equals(curiStr)) {
result = true;
if (!curi.isPrerequisite()) {
curi.setPrerequisite(true);
logger.fine(curi + " is prereq.");
}
}
} catch (URIException e) {
logger.severe("Failed to uuri: " + curi + ", " + e.getMessage());
}
}
return result;
}
protected Set<String> filesInArcs() throws IOException {
List<ArchiveRecordHeader> headers = headersInArcs();
HashSet<String> result = new HashSet<String>();
for (ArchiveRecordHeader arh : headers) {
// ignore 'filedesc:' record
if (arh.getUrl().startsWith("filedesc:")) {
continue;
}
UURI uuri = UURIFactory.getInstance(arh.getUrl());
String path = uuri.getPath();
if (path.startsWith("/")) {
path = path.substring(1);
}
if (arh.getUrl().startsWith("http:")) {
result.add(path);
}
}
LOGGER.finest(result.toString());
return result;
}
protected void addHeaderLink(CrawlURI curi, Header loc) {
if (loc == null) {
// If null, return without adding anything.
return;
}
// TODO: consider possibility of multiple headers
try {
/**
* 302重定向使用自定义的方法存储link
*
* @modify: wuliufu
* @since : 2012-05-11
*/
curi.createAndAddLocationLink(
curi.getVia(), loc.getValue(), loc.getName() + ":", Link.REFER_HOP);
if (curi.getObject(URLInfo.ATTACH) != null) {
UURI outUURI = UURIFactory.getInstance(curi.getUURI(), loc.getValue());
logger.debug(
"ParseHTTP: curi = "
+ curi.getUURI().toString()
+ "&& "
+ loc.getName()
+ "="
+ outUURI.toString());
curi.putObject(outUURI.toString(), curi.getObject(URLInfo.ATTACH));
}
numberOfLinksExtracted++;
} catch (URIException e) {
// There may not be a controller (e.g. If we're being run
// by the extractor tool).
if (getController() != null) {
getController().logUriError(e, curi.getUURI(), loc.getValue());
} else {
logger.info(curi + ", " + loc.getValue() + ": " + e.getMessage());
}
}
}
private CrawlURI createTestUri(String urlStr) throws URIException {
UURI testUuri = UURIFactory.getInstance(urlStr);
CrawlURI testUri = new CrawlURI(testUuri, null, null, LinkContext.NAVLINK_MISC);
return testUri;
}
public void testHQ() throws Exception {
EnvironmentConfig envConfig = new EnvironmentConfig();
envConfig.setTransactional(true);
envConfig.setAllowCreate(true);
File envDir = new File(getTmpDir(), "AR");
if (envDir.exists()) {
FileUtils.deleteDir(envDir);
}
envDir.mkdirs();
Environment env = new Environment(envDir, envConfig);
// Open the class catalog database. Create it if it does not
// already exist.
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setAllowCreate(true);
StoredClassCatalog catalog =
new StoredClassCatalog(env.openDatabase(null, "classes", dbConfig));
AdaptiveRevisitHostQueue hq = new AdaptiveRevisitHostQueue("bok.hi.is", env, catalog, 1);
// Make the CrawlUris
CrawlURI[] curis = {null, null, null, null};
UURI uuri = UURIFactory.getInstance("http://bok.hi.is/1.html");
curis[0] = new CrawlURI(uuri);
curis[0].setVia(null);
uuri = UURIFactory.getInstance("http://bok.hi.is/2.html");
curis[1] = new CrawlURI(uuri);
curis[1].setVia(null);
uuri = UURIFactory.getInstance("http://bok.hi.is/3.html");
curis[2] = new CrawlURI(uuri);
curis[2].setVia(null);
uuri = UURIFactory.getInstance("http://bok.hi.is/4.html");
curis[3] = new CrawlURI(uuri);
curis[3].setVia(null);
assertTrue(
"HQ should be empty initially", hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_EMPTY);
assertEquals("Incorrect nextReadyTime on Empty", Long.MAX_VALUE, hq.getNextReadyTime());
assertEquals("Initial size of HQ should be 0", 0, hq.getSize());
assertEquals("Peek should return null when 'ready queue' is empty", null, hq.peek());
/*
* Add three CrawlURIs and ensures that the correct one is reported by
* peek(); All are added later then current time!
*/
curis[0].putLong(A_TIME_OF_NEXT_PROCESSING, System.currentTimeMillis()); // now
curis[1].putLong(A_TIME_OF_NEXT_PROCESSING, System.currentTimeMillis() + 5000); // in 5 sec
curis[2].putLong(A_TIME_OF_NEXT_PROCESSING, System.currentTimeMillis() + 20000); // in 20 sec.
hq.add(curis[0], false);
assertEquals("First CrawlURI should be top", curis[0].toString(), hq.peek().toString());
assertTrue(
"HQ should no longer be empty", hq.getState() != AdaptiveRevisitHostQueue.HQSTATE_EMPTY);
assertEquals("Size of HQ should now be 1", 1, hq.getSize());
/*
* Invoke next and ensure that the HQ is now busy (initial valence was
* set to 1). Also check for proper errors for a busy HQ. Such as when
* trying to reinvoke next().
*
*/
CrawlURI curi = hq.next(); // Should return curis[2]
assertEquals("next() did not return 'top' URI", curis[0].toString(), curi.toString());
assertTrue(
"HQ should now be busy, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_BUSY);
try {
hq.next();
assertTrue("next() should throw an IllegalStateException if HQ " + "not ready", false);
} catch (IllegalStateException e) {
// This is supposed to happen.
}
assertEquals("New top URI should be null", null, hq.peek());
hq.add(curis[1], false);
assertEquals("Second CrawlURI should be top", curis[1].toString(), hq.peek().toString());
assertEquals("Size of HQ should now be 2", 2, hq.getSize());
// Return it with next fetch time in the future.
curi.putLong(
A_TIME_OF_NEXT_PROCESSING,
hq.peek().getLong(A_TIME_OF_NEXT_PROCESSING) + 100000); // 100 sec behind current top.
hq.update(curi, false, 0);
assertEquals(
"Second CrawlURI should be still be top", curis[1].toString(), hq.peek().toString());
assertEquals("Size of HQ should still be 2", 2, hq.getSize());
hq.add(curis[2], false);
assertEquals("Second CrawlURI should still be top", curis[1].toString(), hq.peek().toString());
assertEquals("Size of HQ should now be 3", 3, hq.getSize());
/*
* If there are no URIs ready, the queue should snooze, even though no
* politeness demand has been made.
* <p>
* Confirms this and that it wakes up.
*/
assertTrue(
"HQ should be snoozed, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_SNOOZED);
// Wait past wakeup time
synchronized (this) {
wait(hq.getNextReadyTime() - System.currentTimeMillis() + 100);
}
assertTrue(
"HQ should now be ready, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_READY);
/*
* Re-adds a URI with a lower ready time which should promote it to the
* top of the queue. Checks if this happens correctly.
*
* Then tests an add override which would demote it back, ensures that
* this fails as it should (i.e. URIs time of next processing remains
* unchanged).
*/
curis[2].putLong(
A_TIME_OF_NEXT_PROCESSING,
curis[1].getLong(A_TIME_OF_NEXT_PROCESSING) - 1000); // 1 sec. prior to current top
hq.add(curis[2], true);
assertEquals("Size of HQ should still be 3", hq.getSize(), 3);
assertEquals("Third CrawlURI should be now be top", curis[2].toString(), hq.peek().toString());
curis[2].putLong(
A_TIME_OF_NEXT_PROCESSING,
curis[1].getLong(A_TIME_OF_NEXT_PROCESSING) + 10000); // 10 sec. later
hq.add(curis[2], true);
assertEquals("Size of HQ should still be 3", hq.getSize(), 3);
assertEquals("Third CrawlURI should still top", curis[2].toString(), hq.peek().toString());
/*
* Invoke next and ensure that the HQ is now busy (initial valence was
* set to 1). Also check for proper errors for a busy HQ. Such as when
* trying to reinvoke next().
*
*/
curi = hq.next(); // Should return curis[2]
assertEquals("next() did not return 'top' URI", curis[2].toString(), curi.toString());
assertTrue(
"HQ should now be busy, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_BUSY);
try {
hq.next();
assertTrue("next() should throw an IllegalStateException if HQ " + "not ready", false);
} catch (IllegalStateException e) {
// This is supposed to happen.
}
assertEquals("New top URI", curis[1].toString(), hq.peek().toString());
/*
* Add a URI while HQ is busy. Check if this succeeds normally.
*
*/
curis[3].putLong(
A_TIME_OF_NEXT_PROCESSING,
curis[1].getLong(A_TIME_OF_NEXT_PROCESSING)
- 1); // 1 msec. ahead of current top (order [2] 3 1 0)
hq.add(curis[3], false);
assertEquals("Size of HQ should now be 4", 4, hq.getSize());
/*
* Invoke update, first with an invalid URI (not the one issued by
* next() earlier), this should fail. Then with the correct one, this
* should succeed. Then finally test update again with an invalid URI
* (i.e. when no HQ has no outstanding URIs, that should fail.
*
* At each step, proper checks are made of state and that methods give
* appropriate errors.
*
* Updated URI is given low time of next processing to put it 'in front'
*/
try {
hq.update(curis[1], false, 0);
assertTrue("update() should not accept URI", false);
} catch (IllegalStateException e) {
// This is supposed to happen
}
// We do not change the 'time of next processing' on update
// so curis[2] should again be at top of queue.
long timeOfPolitenessWakeUp = System.currentTimeMillis() + 2000;
hq.update(curi, true, timeOfPolitenessWakeUp); // Wake in 5 sec.
assertTrue(
"HQ should be snoozed, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_SNOOZED);
try {
hq.update(curis[2], false, 0);
assertTrue("update() should not accept URI", false);
} catch (IllegalStateException e) {
// This is supposed to happen
}
assertEquals(
"HQs time of next ready should reflect set wait time ",
timeOfPolitenessWakeUp,
hq.getNextReadyTime());
/*
* Check if the HQ wakes up from it's 'snoozing'
*
*/
// Wait past wakeup time
synchronized (this) {
wait(hq.getNextReadyTime() - System.currentTimeMillis() + 100);
}
assertTrue(
"HQ should now be ready, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_READY);
assertEquals(
"HQs time of next ready should still be when it 'woken' " + "up.",
timeOfPolitenessWakeUp,
hq.getNextReadyTime());
/*
* Invoke next so that the HQ has a URI being processed. Then
* close the HQ and reopen it to ensure that this happens normally, i.e.
* state is recovered properly, including the restoration of the URI
* being processed, back to the regular queue (where it should be
* first).
*
* On recreating the HQ, set valence to 2.
*/
curi = hq.next(); // Should return curis[2]
assertEquals("next() did not return 'top' URI", curis[2].toString(), curi.toString());
assertTrue(
"HQ should now be busy, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_BUSY);
hq.close();
hq = new AdaptiveRevisitHostQueue("bok.hi.is", env, catalog, 2);
assertEquals("Size of HQ after reopening should now be 4", 4, hq.getSize());
assertTrue(
"HQ should be ready on reopen, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_READY);
assertEquals(
"CrawlURI 'in processing' before should be top", curi.toString(), hq.peek().toString());
/* Check if valence higher then 1 is properly handled.
*
* Invoke next(), check if still ready and new top URI.
*/
curi = hq.next(); // Should return curis[2]
assertEquals("next() did not return 'top' URI", curis[2].toString(), curi.toString());
assertTrue(
"HQ should still be ready, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_READY);
/* Invoke next() again, check if now busy.
*/
curi = hq.next(); // Should return curis[3]
assertEquals("next() did not return 'top' URI", curis[3].toString(), curi.toString());
assertTrue(
"HQ should be busy, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_BUSY);
assertEquals("Size of HQ should still be 4", 4, hq.getSize());
/* Update() second URI issued. Confirm HQ is now ready again. URI is
* given same time of next processing to put it 'in front'. (no snooze)
*/
hq.update(curi, false, 0);
assertTrue(
"HQ should now be ready, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_READY);
assertEquals("'updated' CrawlURI before should be top", curi.toString(), hq.peek().toString());
/* Update() again, ensure proper state. URI is NOT placed at front of
* queue and snooze time is given. But the HQ should not enter a
* snoozed state because the 'other' slot is free.
*/
hq.update(curis[2], true, System.currentTimeMillis() + 1000000); // 10sec
curis[3].putLong(
A_TIME_OF_NEXT_PROCESSING,
curis[1].getLong(A_TIME_OF_NEXT_PROCESSING) + 1000); // 1 sec. behind of current top
assertTrue(
"HQ should still be ready, is " + hq.getStateByName(),
hq.getState() == AdaptiveRevisitHostQueue.HQSTATE_READY);
assertEquals("Top CrawlURI before should be unchanged", curi.toString(), hq.peek().toString());
// TODO: Test sorting with scheduling directives.
/*
* Close the ARHostQueue and the Environment
*/
hq.close();
catalog.close();
env.close();
cleanUpOldFiles("AR");
}